CN113589069A - Electromagnetic compatibility test system and test method for DC-DC (direct Current-direct Current) for automobile - Google Patents
Electromagnetic compatibility test system and test method for DC-DC (direct Current-direct Current) for automobile Download PDFInfo
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- CN113589069A CN113589069A CN202110756302.1A CN202110756302A CN113589069A CN 113589069 A CN113589069 A CN 113589069A CN 202110756302 A CN202110756302 A CN 202110756302A CN 113589069 A CN113589069 A CN 113589069A
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- 238000012360 testing method Methods 0.000 title claims abstract description 40
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- 238000002955 isolation Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 230000005855 radiation Effects 0.000 claims description 3
- 239000003381 stabilizer Substances 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 230000017525 heat dissipation Effects 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 description 4
- 239000013307 optical fiber Substances 0.000 description 4
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/001—Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/005—Testing of electric installations on transport means
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
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Abstract
The invention discloses an electromagnetic compatibility test system and a test method of DC-DC for an automobile, comprising a high-voltage direct-current stabilized power supply, a lead-acid storage battery, a filter, a load system controller, a waveform generator and a photoelectric converter; the output end of the waveform generator is connected with a control signal of the DC-DC to be detected in the darkroom through a photoelectric converter; the high-voltage direct-current stabilized voltage supply enters a darkroom through a filter and is connected to a 48V power supply port of the DC-DC to be detected through a high-voltage artificial impedance network; the lead-acid storage battery is connected to a 12V power supply port of the DC-DC to be detected through a low-voltage artificial impedance network; and the load system is connected with the DC-DC output end to be tested in the darkroom through a filter. The problems of heat dissipation, electromagnetic reflection, poor shielding, low test efficiency, high energy consumption and the like caused by overlarge volume in the traditional resistive load test process are solved.
Description
Technical Field
The invention discloses a 48V/12V direct current-direct current converter (DC-DC) electromagnetic compatibility test system and method for an automobile, and belongs to the technical field of automobile electronic electromagnetic compatibility tests.
Background
With the increasing strictness of energy conservation and emission reduction, 48V automobile electrical systems are produced. Compared with the traditional system, the bidirectional DC-DC is added on the basis of reserving the 12V system, the 48V network and the 12V network are connected for bidirectional energy transmission, and the method has a positive effect on the implementation of energy management strategies.
At present, when a common laboratory tests a DC-DC product, a high-voltage or low-voltage power supply is used for supplying power to a sample piece, and resistive loads are mostly adopted for loads.
Resistive load cells have the following disadvantages:
(1) the large-volume load box cannot achieve good shielding;
(2) the large-volume load box can generate reflection in the electromagnetic darkroom, so that the electromagnetic background noise in the darkroom is easy to exceed the standard;
(3) the large-volume load box is easy to cause the temperature in the darkroom to rise, the test process is forced to be interrupted, and the test efficiency is very low;
(4) the large-size load box, electric energy is converted into heat energy by resistive load, and these heat energy still need the air conditioning system refrigeration of darkroom, and the energy waste is serious.
In summary, resistive loads have not been suitable for reuse with high power DC-DC.
Disclosure of Invention
The invention provides an electromagnetic compatibility test system and method of a 48V/12V direct current-direct current converter (DC-DC) for an automobile, which solve a series of problems caused by large-volume resistive load.
The purpose of the invention is realized by the following technical scheme:
as an aspect of the present invention, there is provided an electromagnetic compatibility test system of DC-DC for an automobile, including:
the power supply system comprises a high-voltage direct-current stabilized power supply for supplying high-voltage power to the DC-DC and a lead-acid storage battery for supplying low-voltage power to the automobile;
a load system for simulating a DC-DC current output;
the control system comprises a waveform generator and 1 group of photoelectric converters, wherein the output end of the waveform generator is connected with a control signal of the DC-DC to be detected in the darkroom through the photoelectric converters;
the isolation filtering system comprises a filter and an artificial impedance network;
the high-voltage direct-current stabilized voltage power supply enters a darkroom through a filter and is connected to a 48V power supply port of the DC-DC to be detected through a high-voltage artificial impedance network; the lead-acid storage battery is connected to a 12V power supply port of the DC-DC to be detected through a low-voltage artificial impedance network; and the load system is connected with a DC-DC output end to be tested in the darkroom through a filter.
Further, the high-voltage direct-current stabilized voltage power supply is placed outside the electromagnetic darkroom, and the set voltage value is 48V.
Furthermore, the high-voltage direct-current stabilized voltage power supply enters the darkroom through a filter reserved on the wall of the darkroom and is connected to a 48V power supply port of the DC-DC to be measured through a high-voltage artificial impedance network (MAN).
Further, the lead-acid storage battery is placed inside an electromagnetic darkroom, and the voltage is set to be 12V.
Further, the lead-acid storage battery is provided with a voltage stabilizing device.
Further, the lead-acid battery is arranged inside a dark room and is directly connected to a 12V power supply port of the DC-DC to be tested through a low-voltage artificial impedance network (LISN).
Further, the load system is an electronic load.
Further, the waveform generator is an arbitrary waveform generator, which is placed outside the electromagnetic dark room and is set as PWM output, and the duty ratio can be changed from 0% to 100%; the output end of the waveform generator is connected with a control signal of the DC-DC to be detected through a group of photoelectric converters arranged inside and outside the darkroom.
As another aspect of the present invention, there is provided a method for testing an electromagnetic compatibility test system of DC-DC for an automobile, comprising the steps of:
the method comprises the following steps of: placing the high-voltage direct-current voltage-stabilized power supply outside an electromagnetic darkroom, and setting the voltage value to be 48V; placing a lead-acid storage battery in an electromagnetic darkroom, and setting the voltage to be 12V;
secondly, the high-voltage direct-current voltage-stabilized power supply enters a darkroom through a filter reserved on the wall of the darkroom and is connected to a 48V power supply port of the DC-DC to be detected through a high-voltage artificial impedance network; the lead-acid storage battery is arranged in the hint and is directly connected to a 12V power supply port of the DC-DC to be tested through a low-voltage artificial impedance network;
thirdly, arranging a load system: an electronic load is placed outside the darkroom and is connected with a DC-DC output end in the darkroom through a filter and an artificial network;
fourthly, the waveform generator is placed outside the electromagnetic dark room and is set to be PWM output, and the duty ratio can be changed from 0% to 100%; the output end of the waveform generator is connected with a control signal of the DC-DC to be detected through a group of photoelectric converters arranged inside and outside the darkroom;
and fifthly, adjusting the waveform generator to generate PWM control signals with different duty ratios, extracting current according to the range of the DC-DC output current by matching with an electronic load, simulating the output of the DC-DC current, controlling different loading states of the DC-DC, and completing the measurement of the radiation emission electromagnetic quantity under different conditions.
Further, the regulation and setting rule of the working mode of the DC-DC is as follows:
the duty ratio is 0%, and the corresponding working mode is Standby;
the duty ratio is 100%, and the corresponding working mode is Bulk, namely a full load state.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a 48V/12V direct current-direct current converter (DC-DC) electromagnetic compatibility test system and a method for an automobile, which solve a series of problems of heat dissipation, electromagnetic reflection, poor shielding, low test efficiency, high energy consumption and the like caused by overlarge volume in the traditional resistive load test process.
The testing system and the method of the invention adopt the electronic load, have small volume, are arranged outside the darkroom and are matched with the waveform generator, and can efficiently complete the switching of the working modes of the DC-DC under different loading states on the premise of not causing great changes of the temperature environment and the electromagnetic environment inside the darkroom to influence the testing.
Drawings
FIG. 1 is a block diagram of the test system of the present invention;
FIG. 2 is a flow chart of a testing method of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, an embodiment of the present invention provides a 48V/12V direct current-direct current converter (DC-DC) electromagnetic compatibility testing system for an automobile based on the prior art, which is built in an electromagnetic shielding darkroom, and includes:
the power supply system comprises a high-voltage direct-current stabilized power supply for supplying power to the DC-DC at 48V and a lead-acid storage battery for supplying power to the automobile at 12V;
a load system for simulating a DC-DC current output;
the control system comprises a waveform generator and 1 group of photoelectric converters, wherein the output end of the waveform generator is connected with a control signal of the DC-DC to be detected in the darkroom through the photoelectric converters;
the isolation filtering system comprises a filter and an artificial impedance network;
the high-voltage direct-current stabilized voltage power supply enters a darkroom through a filter and is connected to a 48V power supply port of the DC-DC to be detected through a high-voltage artificial impedance network; the lead-acid storage battery is connected to a 12V power supply port of the DC-DC to be detected through a low-voltage artificial impedance network; and the load system is connected with a DC-DC output end to be tested in the darkroom through a filter.
Further, the high-voltage direct-current stabilized voltage power supply is placed outside the electromagnetic darkroom, and the set voltage value is 48V.
Preferably, the high-voltage direct-current voltage-stabilized power supply is TEK Keithley 2000.
Furthermore, the high-voltage direct-current stabilized voltage power supply enters the darkroom through a filter reserved on the wall of the darkroom and is connected to a 48V power supply port of the DC-DC to be measured through a high-voltage artificial impedance network (MAN).
Further, the lead-acid storage battery is placed inside an electromagnetic darkroom, and the voltage is set to be 12V.
Further, the lead-acid storage battery is provided with a voltage stabilizing device.
Further, the lead-acid battery is arranged inside a dark room and is directly connected to a 12V power supply port of the DC-DC to be tested through a low-voltage artificial impedance network (LISN).
Further, the load system is an electronic load.
Preferably, the electronic load model is EA-EL 9080-200 HP.
Further, the waveform generator is an arbitrary waveform generator, which is placed outside the electromagnetic dark room and is set as PWM output, and the duty ratio can be changed from 0% to 100%; the output end of the waveform generator is connected with a control signal of the DC-DC to be detected through a group of photoelectric converters arranged inside and outside the darkroom.
Preferably, the waveform generator is of the type TEK AFG 2000.
Preferably, the filter model is SH-2014K-S-32A-DC.
Preferably, the high-voltage artificial impedance network is in the model of R & S NNHV-8123-.
A test method of a 48V/12V direct current-direct current converter (DC-DC) electromagnetic compatibility test system for an automobile comprises the following steps:
the method comprises the following steps of: placing the high-voltage direct-current voltage-stabilized power supply outside an electromagnetic darkroom, and setting the voltage value to be 48V; placing a lead-acid storage battery in an electromagnetic darkroom, and setting the voltage to be 12V;
secondly, the high-voltage direct-current voltage-stabilized power supply enters a darkroom through a filter reserved on the wall of the darkroom and is connected to a 48V power supply port of the DC-DC to be detected through a high-voltage artificial impedance network; the lead-acid storage battery is arranged in the hint and is directly connected to a 12V power supply port of the DC-DC to be tested through a low-voltage artificial impedance network;
thirdly, arranging a load system: an electronic load is placed outside the darkroom and is connected with a DC-DC output end in the darkroom through a filter and an artificial network;
fourthly, the waveform generator is placed outside the electromagnetic dark room and is set to be PWM output, and the duty ratio can be changed from 0% to 100%; the output end of the waveform generator is connected with a control signal of the DC-DC to be detected through a group of photoelectric converters arranged inside and outside the darkroom;
and fifthly, adjusting the waveform generator to generate PWM control signals with different duty ratios, extracting current according to the range of the DC-DC output current by matching with an electronic load, simulating the output of the DC-DC current, controlling different loading states of the DC-DC, and completing the measurement of the radiation emission electromagnetic quantity under different conditions.
Further, the regulation and setting rule of the working mode of the DC-DC is as follows:
the duty ratio is 0%, and the corresponding working mode is Standby;
the duty ratio is 100%, and the corresponding working mode is Bulk, namely a full load state.
Example 1
The invention relates to a 48V/12V direct current-direct current converter (DC-DC) electromagnetic compatibility test system for an automobile, which is used for carrying out an electromagnetic emission test in a DC-DC-Standard mode, and the test method comprises the following steps:
step 1, regulating a low-voltage storage battery to be 12V for stable power supply;
step 2, setting a high-voltage direct-current power supply to be stable at 48V for power supply;
step 3, converting a PWM wave signal of a waveform generator into an optical fiber signal by a group of optical couplers arranged outside the darkroom, converting the optical fiber signal into a control signal by the optical couplers in the other group of darkroom, adjusting the PWM duty ratio by the waveform generator, controlling a DCDC working mode, and setting the duty ratio to be 0 in the current Standby mode;
step 4, setting electronic load current, 0A;
step 5, setting a darkroom antenna as a receiving antenna, and connecting a frequency spectrum receiver outside the darkroom;
and 6, respectively replacing the receiving antenna with a rod antenna (0.1-30MHz), a biconical antenna (30-200MHz), a logarithmic antenna (200 + 1000MHz) and a horn antenna (1000-2500 MHz) to finish the DC-DC electromagnetic emission test in the relevant frequency band, and when the test value is lower than the design limit value requirement according to the electromagnetic emission value received by the antenna, the electromagnetic emission test is qualified.
Example 2
The invention relates to a 48V/12V direct current-direct current converter (DC-DC) electromagnetic compatibility test system for an automobile, which is used for carrying out an electromagnetic emission test in a DC-DC-Bulk mode, and the test method comprises the following steps:
step 1, regulating a low-voltage storage battery to be 12V for stable power supply;
step 2, setting a high-voltage direct-current power supply to be stable at 48V for power supply;
step 3, a group of optical couplers arranged outside the darkroom are used for converting a PWM wave signal of the waveform generator into an optical fiber signal, the optical couplers in the other group of darkroom are used for converting the optical fiber signal into a control signal, the PWM duty ratio is adjusted through the waveform generator, a DCDC working mode is controlled, and the current Bulk mode is set with the duty ratio of 100%;
step 4, setting an electronic load current, 40A;
step 5, setting a darkroom antenna as a receiving antenna, and connecting a frequency spectrum receiver outside the darkroom;
and 6, respectively replacing the receiving antenna with a rod antenna (0.1-30MHz), a biconical antenna (30-200MHz), a logarithmic antenna (200 + 1000MHz) and a horn antenna (1000-2500 MHz) to finish the DCDC electromagnetic emission test in the relevant frequency band, and when the test value is lower than the design limit value requirement according to the electromagnetic emission value received by the antenna, the electromagnetic emission test is qualified.
While embodiments of the invention have been disclosed above, it is not intended to be limited to the uses set forth in the specification and examples. It can be applied to all kinds of fields suitable for the present invention. Additional modifications will readily occur to those skilled in the art. It is therefore intended that the invention not be limited to the exact details and illustrations described and illustrated herein, but fall within the scope of the appended claims and equivalents thereof.
Claims (10)
1. An electromagnetic compatibility test system for DC-DC for an automobile, comprising:
the power supply system comprises a high-voltage direct-current stabilized power supply for supplying high-voltage power to the DC-DC and a lead-acid storage battery for supplying low-voltage power to the automobile;
a load system for simulating a DC-DC current output;
the control system comprises a waveform generator and a photoelectric converter, wherein the output end of the waveform generator is connected with a control signal of the DC-DC to be detected in the darkroom through the photoelectric converter;
the isolation filtering system comprises a filter and an artificial impedance network;
the high-voltage direct-current stabilized voltage power supply enters a darkroom through a filter and is connected to a 48V power supply port of the DC-DC to be detected through a high-voltage artificial impedance network; the lead-acid storage battery is connected to a 12V power supply port of the DC-DC to be detected through a low-voltage artificial impedance network; and the load system is connected with a DC-DC output end to be tested in the darkroom through a filter.
2. The system of claim 1, wherein the high voltage DC voltage regulator is placed outside the electromagnetic darkroom and set to 48V.
3. The electromagnetic compatibility testing system of DC-DC for the automobile of claim 2, characterized in that the high voltage direct current stabilized voltage power supply enters the darkroom through a filter reserved on the wall of the darkroom and is connected to the 48V power supply port of the DC-DC to be tested through a high voltage artificial impedance network.
4. The electromagnetic compatibility testing system of DC-DC for automobile according to claim 1, characterized in that said lead-acid battery is placed inside an electromagnetic dark room with a voltage set at 12V.
5. The electromagnetic compatibility testing system of DC-DC for automobile according to claim 4, characterized in that said lead-acid battery is provided with a voltage stabilizer.
6. The electromagnetic compatibility testing system of DC-DC for the automobile according to claim 4, characterized in that the lead-acid storage battery is arranged inside a darkroom and is directly connected to a 12V power supply port of the DC-DC to be tested through a low-voltage artificial impedance network.
7. The system according to claim 1, wherein the load system is an electronic load.
8. The electromagnetic compatibility testing system of DC-DC for automobile according to claim 1, characterized in that said waveform generator is an arbitrary waveform generator, which is placed outside the electromagnetic darkroom, set as PWM output, and the duty ratio can be changed from 0% to 100%; the output end of the waveform generator is connected with a control signal of the DC-DC to be detected through a group of photoelectric converters arranged inside and outside the darkroom.
9. The method for testing an electromagnetic compatibility testing system of DC-DC for an automobile according to claim 1, comprising the steps of:
the method comprises the following steps of: placing the high-voltage direct-current voltage-stabilized power supply outside an electromagnetic darkroom, and setting the voltage value to be 48V; placing a lead-acid storage battery in an electromagnetic darkroom, and setting the voltage to be 12V;
secondly, the high-voltage direct-current voltage-stabilized power supply enters a darkroom through a filter reserved on the wall of the darkroom and is connected to a 48V power supply port of the DC-DC to be detected through a high-voltage artificial impedance network; the lead-acid storage battery is arranged in the hint and is directly connected to a 12V power supply port of the DC-DC to be tested through a low-voltage artificial impedance network;
thirdly, arranging a load system: an electronic load is placed outside the darkroom and is connected with a DC-DC output end in the darkroom through a filter and an artificial network;
fourthly, the waveform generator is placed outside the electromagnetic dark room and is set to be PWM output, and the duty ratio can be changed from 0% to 100%; the output end of the waveform generator is connected with a control signal of the DC-DC to be detected through a group of photoelectric converters arranged inside and outside the darkroom;
and fifthly, adjusting the waveform generator to generate PWM control signals with different duty ratios, extracting current according to the range of the DC-DC output current by matching with an electronic load, simulating the output of the DC-DC current, controlling different loading states of the DC-DC, and completing the measurement of the radiation emission electromagnetic quantity under different conditions.
10. The method according to claim 9, wherein the DC-DC operation mode adjustment setting rule is as follows:
the duty ratio is 0%, and the corresponding working mode is in a standby state;
the duty cycle is 100%, corresponding to the operating mode being a full load state.
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Country or region after: China Address after: 130012 no.4888, Yushan Road, Changchun high tech Development Zone, Jilin Province Applicant after: FAW Besturn Automotive Co.,Ltd. Address before: No. 4888, Yushan Road, Changchun high tech Industrial Development Zone, Changchun City, Jilin Province Applicant before: FAW Pentium Car Co.,Ltd. Country or region before: China |